[kbuild-all] [rppt:pg_table/v0.0 11/18] mm/memory.c:430:3: error: implicit declaration of function '_pmd_populate'; did you mean '_pud_populate'?

tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git pg_table/v0.0 head: fd150c5a9ef6e3e43818825c69a46de2b427dedf commit: a28a3e30c8e9b58a6da1d5e6a4803c5580e93ce5 [11/18] mm: enable pte allocations for pg_table config: riscv-allnoconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a28a3e30c8e9b58a6da1d5e6a4803c5580e93ce5 # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): mm/memory.c: In function '__pte_alloc': _pmd_populate(pgt, pmd, new); ^~~~~~~~~~~~~ _pud_populate cc1: some warnings being treated as errors vim +430 mm/memory.c 404 405 int __pte_alloc(struct pg_table *pgt, pmd_t *pmd) 406 { 407 spinlock_t *ptl; 408 pgtable_t new = pte_alloc_one(pgt); 409 if (!new) 410 return -ENOMEM; 411 412 /* 413 * Ensure all pte setup (eg. pte page lock and page clearing) are 414 * visible before the pte is made visible to other CPUs by being 415 * put into page tables. 416 * 417 * The other side of the story is the pointer chasing in the page 418 * table walking code (when walking the page table without locking; 419 * ie. most of the time). Fortunately, these data accesses consist 420 * of a chain of data-dependent loads, meaning most CPUs (alpha 421 * being the notable exception) will already guarantee loads are 422 * seen in-order. See the alpha page table accessors for the 423 * smp_read_barrier_depends() barriers in page table walking code. 424 */ 425 smp_wmb(); /* Could be smp_wmb__xxx(before|after)_spin_lock */ 426 427 ptl = _pmd_lock(pgt, pmd); 428 if (likely(pmd_none(*pmd))) { /* Has another populated it ? */ 429 mm_inc_nr_ptes(pgt); 431 new = NULL; 432 } 433 spin_unlock(ptl); 434 if (new) 435 pte_free(pgt, new); 436 return 0; 437 } 438 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation